* tests/atgeneral.m4: Import M4sh.
Adjust the differences on the names of the builtins (define etc.).
(AT_CASE): Remove, use m4_case.
(AT_SETUP): Don't use `AT_group_description', `$1' is OK.
* tests/atspecific.m4 (m4_for, m4_foreach): Remove, use those of
M4sugar.
* tests/m4sugar.at: Strengthen the quotation and adjust to the new
macro names.
* tests/m4sh.at: Ditto.
* tests/torture.at: Ditto.
* tests/base.at: Ditto.
* m4sh.m4: Import M4sugar.
* autoconf.m4: Don't import M4sugar, M4sh does.
Reported by Paul Martinolich.
* acgeneral.m4 (AC_PROVIDE): Don't forget to `m4_provide'!!!
Tss, novice...
* tests/base.at (AC_REQUIRE & AC_PROVIDE): New test.
caused strange messages about AC_ARG_PROGRAM.
Reported by Jim Meyering.
* acgeneral.m4 (AC_DEFUN_ONCE): Fix the indirection to
m4_defun_once.
* m4sugar.m4 (m4_defun_once): Also define
`m4_location(MACRO-NAME)'. s/ac_warn/m4_warn/.
Use `m4_defn' to read `m4_location'.
* tests/base.at (AC_REQUIRE & AC_DEFUN_ONCE): Two new tests.
